X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/c42ccd1f88e75b7910623581fbdf8d88c42b55dd..ad7679cfe57733940f8461097ee01bfd97997ce6:/sdk/python/tests/test_arvfile.py

diff --git a/sdk/python/tests/test_arvfile.py b/sdk/python/tests/test_arvfile.py
index 1701aa43ca..d5b0c43a96 100644
--- a/sdk/python/tests/test_arvfile.py
+++ b/sdk/python/tests/test_arvfile.py
@@ -228,7 +228,7 @@ class ArvadosFileWriterTestCase(unittest.TestCase):
         with Collection('. ' + arvados.config.EMPTY_BLOCK_LOCATOR + ' 0:0:count.txt',
                              api_client=api, keep_client=keep) as c:
             writer = c.open("count.txt", "r+")
-            text = ''.join(["0123456789" for a in xrange(0, 100)])
+            text = "0123456789" * 100
             for b in xrange(0, 100000):
                 writer.write(text)
             self.assertEqual(writer.size(), 100000000)
@@ -239,6 +239,23 @@ class ArvadosFileWriterTestCase(unittest.TestCase):
             self.assertEqual("zzzzz-4zz18-mockcollection0", c.manifest_locator())
             self.assertEqual(False, c.modified())
 
+
+    def test_large_write(self):
+        keep = ArvadosFileWriterTestCase.MockKeep({})
+        api = ArvadosFileWriterTestCase.MockApi({}, {})
+        with Collection('. ' + arvados.config.EMPTY_BLOCK_LOCATOR + ' 0:0:count.txt',
+                             api_client=api, keep_client=keep) as c:
+            writer = c.open("count.txt", "r+")
+            self.assertEqual(writer.size(), 0)
+
+            text = "0123456789"
+            writer.write(text)
+            text = "0123456789" * 9999999
+            writer.write(text)
+            self.assertEqual(writer.size(), 100000000)
+
+            self.assertEqual(c.manifest_text(), ". 781e5e245d69b566979b86e28d23f2c7+10 48dd23ea1645fd47d789804d71b5bb8e+67108864 77c57dc6ac5a10bb2205caaa73187994+32891126 0:100000000:count.txt\n")
+
     def test_rewrite_on_empty_file(self):
         keep = ArvadosFileWriterTestCase.MockKeep({})
         with Collection('. ' + arvados.config.EMPTY_BLOCK_LOCATOR + ' 0:0:count.txt',